Improvement in balance slide-valves



R. WITTY.

Balance Slide-valves- NOA/19,019. Pa:entedMarch24,1874..

J/VIQN'ESSES. V/ i uw, @WWK .Attorney/s.

PATENT RICHARD wITTY, or sTUART, IOWA.

IMPROVEMENT IN BALANCE SLIDE-VALVES.

Specification forming part of Letters Patent No. 149,019, dated March24,11874; application led January 20, 1874.

To all whom. it may concern:

Be it known that I, RICHARD WITTY, of Stuart, in the county of Adair andin the State of Iowa, have invented certain new and useful Improvementsin Balance Slide-Valves 5 and do hereby declare that the following is afull, clear, and exact description thereof, reference being had to theaccompanying drawings and to the letters of reference marked thereon,making a part of this speciiication.

The nature of my invention consists in the combination, with acylindrical steam-chest having a steam passage at the top withinletports, outlet-ports at the bottom, and a round valve, of avalve-stem connected to the valve near the bottom, as will behereinafter more fully set forth.

In order to enable others skilled in the art to which my inventionappertains to make and use the same, I will now proceed to describe itsconstruction and operation, referring to the annexed drawing, in which-Figure l is a longitudinal section of the steam-chest and valve. Fig. 2is a bottom view of the same. Fi g. 3 is a side view of the valve, andFig. 4 is an end view of the same.

A represents the steam-chest, made in cylindrical form, and bolted tothe cylinder of the engine in the usual place where the steamchestsgenerally are bolted. The cylindrical steam-chest A is provided withthree ports, a a and b, the middle port b being for the exhaust and theside ports a a for the steam. B represents the valve, made round to tthe interior of the steam-chest A, and provided with a number ofcircumferential split metal or composition rings, cl d, placed ingrooves around the valve for the purpose of making the valve perfectlysteam-tight while covering the ports. Through the valve are passages c eto allow the steam to pass through the valve from either side of thevalve to the open port. In the bottom of the valve is an exhaust-port,h, which will allow the steam to exhaust while passing over thesteam-ports. G is the valvestem, which is attached to the valve near thebottom in order to come in a line with the rocker-arm of the locomotive.G is a steampassage on the upper part, extending nearly the entirelength of the chest A. In its center is a steam-inlet, D, and at itsbottom, near each end, is a small inlet-port, a2, which portsalternately convey the steam within the chest at alternate ends of thevalve.

Having thus fully described my invent-ion, what I claim as new, anddesire to secure by Letters Patent, isy The combination, with thecylindrical steamchest A with passage G and inlet-ports w a' at the top,and ports a t and b at the bottom, and valve B, of the valve-stem Cconnected to the valve near its bottom, as and for the purposes hereinset forth.

In testimony that I claim the foregoing I have hereunto set my hand this24th day of December, 1ST I RICHARD IVITTY.

Witnesses:

C. In. EVERT, JOHN S. LITTLE.

